From Nature:
Researchers say they have used a precise genome-editing technique called base editing to alter the genome of human embryos for the first time. The announcement has prompted excitement and caution among scientists and bioethicists. Many say the work is an impressive step towards scientists being able to fix disease-causing mutations in embryos. But others worry the technology could be deployed to try to create embryos with traits such as superior intelligence.
Dieter Egli, a developmental cell biologist at Columbia University in New York City and his colleagues posted their results on the bioRxiv preprint site on 1 June1. The study, which was first reported by The New York Times, has not yet been peer reviewed.
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